Open AccessBroadband low-scattering metasurface using a combination of phase cancellation and absorption mechanisms
Author(s) -
Ji Chen,
Cheng Huang,
Xu Zhang,
Jianing Yang,
Jun Song,
Xiangang Luo
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.023368
Subject(s) - scattering , optics , broadband , phase (matter) , resistive touchscreen , materials science , absorption (acoustics) , reflection (computer programming) , electromagnetic radiation , electric field , physics , computer science , quantum mechanics , computer vision , programming language
In this paper, a broadband low-scattering metasurface is proposed by using a combination of phase cancellation and absorption mechanisms. The metasurface is composed of two structural layers. One layer adopts the geometric phase cell that can obtain a different reflection phase by changing its orientation. Through the random phase distribution design, electromagnetic diffusion can be realized to reduce the backward scattering energy. The other layer is made of a resistive frequency selective surface (RFSS) that can absorb the incident wave by converting it into Ohmic loss. The above two physical mechanisms respectively play the great roles at two distinct frequency bands, and finally make our metasurface achieve the RCS reduction over a wide frequency band ranging from 13 to 31.5 GHz. Both simulation and experimental results are in good agreement, which fully demonstrates our design method. The analysis of the scattering patterns, electric-field distribution and power loss density are given to explain the hybrid RCS-reduction mechanism of our metasurface.